Move remaining inline assembly test files into asm directory

Before:
```
tests/assembly/asm/*
tests/assembly/asm-comments.rs
tests/codegen/asm-target-clobbers.rs
tests/codegen/asm-goto.rs
tests/codegen/asm-maybe-uninit.rs
tests/codegen/asm-msp430-clobbers.rs
tests/codegen/asm-options.rs
tests/codegen/asm-clobbers.rs
tests/codegen/asm-may_unwind.rs
tests/codegen/asm-arm64ec-clobbers.rs
tests/codegen/asm-powerpc-clobbers.rs
tests/codegen/asm-sanitize-llvm.rs
tests/codegen/asm-s390x-clobbers.rs
tests/codegen/asm-clobber_abi.rs
tests/codegen/asm-multiple-options.rs
tests/codegen/global_asm.rs
tests/codegen/global_asm_include.rs
tests/codegen/global_asm_x2.rs
tests/ui/asm/*
```

After:
```
tests/assembly/asm/*
tests/codegen/asm/*
tests/ui/asm/*
```

I moved the remaining standalone test files into the asm directory, and then either removed the "asm-" suffix or for x86-specific registers tests replaced the "asm-" suffix with the "x86-" suffix.

(Then I noticed that there is no test for clobber_abi for already stabilized aarch64, arm, riscv, and loongarch64 asm... I don't believe there is a problem like rust-lang#131332, but I plan to add tests for them later.)

r? `@Amanieu`

`@rustbot` label +A-inline-assembly

Rollup of 13 pull requests

Successful merges:

 - rust-lang#131829 (Remove support for `-Zprofile` (gcov-style coverage instrumentation))
 - rust-lang#132369 (style-guide: Only use the new binop heuristic for assignments)
 - rust-lang#132383 (Implement suggestion for never type fallback lints)
 - rust-lang#132437 (coverage: Regression test for inlining into an uninstrumented crate)
 - rust-lang#132438 (Remove unncessary option for default rust-analyzer setting)
 - rust-lang#132439 (Add `f16` and `f128` to `invalid_nan_comparison`)
 - rust-lang#132445 (Cleanup attributes around unchecked shifts and unchecked negation in const)
 - rust-lang#132448 (Add missing backtick)
 - rust-lang#132450 (Show actual MIR when MIR building forgot to terminate block)
 - rust-lang#132451 (remove some unnecessary rustc_allow_const_fn_unstable)
 - rust-lang#132455 (make const_alloc_layout feature gate only about functions that are already stable)
 - rust-lang#132456 (Move remaining inline assembly test files into asm directory)
 - rust-lang#132459 (feat(byte_sub_ptr): unstably add ptr::byte_sub_ptr)

r? `@ghost`
`@rustbot` modify labels: rollup

…llaumeGomez

Rollup of 14 pull requests

Successful merges:

 - rust-lang#131829 (Remove support for `-Zprofile` (gcov-style coverage instrumentation))
 - rust-lang#132369 (style-guide: Only use the new binop heuristic for assignments)
 - rust-lang#132383 (Implement suggestion for never type fallback lints)
 - rust-lang#132413 (update offset_of! docs to reflect the stabilization of nesting)
 - rust-lang#132438 (Remove unncessary option for default rust-analyzer setting)
 - rust-lang#132439 (Add `f16` and `f128` to `invalid_nan_comparison`)
 - rust-lang#132444 (rustdoc: Directly use rustc_abi instead of reexports)
 - rust-lang#132445 (Cleanup attributes around unchecked shifts and unchecked negation in const)
 - rust-lang#132448 (Add missing backtick)
 - rust-lang#132450 (Show actual MIR when MIR building forgot to terminate block)
 - rust-lang#132451 (remove some unnecessary rustc_allow_const_fn_unstable)
 - rust-lang#132455 (make const_alloc_layout feature gate only about functions that are already stable)
 - rust-lang#132456 (Move remaining inline assembly test files into asm directory)
 - rust-lang#132459 (feat(byte_sub_ptr): unstably add ptr::byte_sub_ptr)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#132456 - taiki-e:test-asm-dir, r=jieyouxu

Move remaining inline assembly test files into asm directory

Before:
```
tests/assembly/asm/*
tests/assembly/asm-comments.rs
tests/codegen/asm-target-clobbers.rs
tests/codegen/asm-goto.rs
tests/codegen/asm-maybe-uninit.rs
tests/codegen/asm-msp430-clobbers.rs
tests/codegen/asm-options.rs
tests/codegen/asm-clobbers.rs
tests/codegen/asm-may_unwind.rs
tests/codegen/asm-arm64ec-clobbers.rs
tests/codegen/asm-powerpc-clobbers.rs
tests/codegen/asm-sanitize-llvm.rs
tests/codegen/asm-s390x-clobbers.rs
tests/codegen/asm-clobber_abi.rs
tests/codegen/asm-multiple-options.rs
tests/codegen/global_asm.rs
tests/codegen/global_asm_include.rs
tests/codegen/global_asm_x2.rs
tests/ui/asm/*
```

After:
```
tests/assembly/asm/*
tests/codegen/asm/*
tests/ui/asm/*
```

I moved the remaining standalone test files into the asm directory, and then either removed the "asm-" suffix or for x86-specific registers tests replaced the "asm-" suffix with the "x86-" suffix.

(Then I noticed that there is no test for clobber_abi for already stabilized aarch64, arm, riscv, and loongarch64 asm... I don't believe there is a problem like rust-lang#131332, but I plan to add tests for them later.)

r? ``@Amanieu``

``@rustbot`` label +A-inline-assembly