[feature] instrument add-on discovery.
Currently the output from the initial build successful is not indicative of the time it took from starting the build to this point.
It would be great to add instrumentation to the addon discovery to be able to get a more accurate representation of the total time it took to build.
Output from ember version --verbose && npm --version && yarn --version:
ember-cli: 3.17.0
node: 14.2.0
v8: 8.1.307.31-node.33
uv: 1.37.0
zlib: 1.2.11
brotli: 1.0.7
ares: 1.16.0
modules: 83
nghttp2: 1.40.0
napi: 6
llhttp: 2.0.4
openssl: 1.1.1g
cldr: 36.1
icu: 66.1
tz: 2019c
unicode: 13.0
os: darwin x64
6.14.4
1.22.4
