ci: install minimal lint & doc deps

[dyladan]

Which problem is this PR solving?

• Only install doc and lint dependencies (not a full install) #498

Short description of the changes

This installs only the bare minimum required to run yarn run check and yarn run docs. The reason for the odd lerna exec symlinking is because gts looks for rules packages in the local node modules, and does not look in the global directory.

[dyladan]

Overall time reduction from 4:28 on the last lint & docs build to 48 seconds.

Full test run reduced from ~9 minutes to ~6 minutes

[codecov-io]

Codecov Report

Merging #508 into master will increase coverage by 0.9%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #508     +/-   ##
=========================================
+ Coverage   91.83%   92.73%   +0.9%     
=========================================
  Files         115      135     +20     
  Lines        5656     6453    +797     
  Branches      521      568     +47     
=========================================
+ Hits         5194     5984    +790     
- Misses        462      469      +7

Impacted Files	Coverage Δ
packages/opentelemetry-plugin-http/src/http.ts	97.32% <ø> (ø)	⬆️
packages/opentelemetry-plugin-http/src/utils.ts	100% <100%> (ø)	⬆️
packages/opentelemetry-plugin-grpc/src/grpc.ts	96.23% <100%> (ø)	⬆️
...telemetry-plugin-document-load/src/documentLoad.ts	98.09% <100%> (ø)	⬆️
...kages/opentelemetry-metrics/test/mocks/Exporter.ts	66.66% <0%> (-33.34%)	⬇️
...opentelemetry-base/test/resources/resource.test.ts	100% <0%> (ø)	⬆️
.../opentelemetry-plugin-dns/test/utils/assertSpan.ts	100% <0%> (ø)	⬆️
...try-plugin-dns/test/functionals/dns-enable.test.ts	100% <0%> (ø)	⬆️
...telemetry-scope-base/test/NoopScopeManager.test.ts	100% <0%> (ø)	⬆️
...-plugin-postgres/opentelemetry-plugin-pg/src/pg.ts	91.37% <0%> (ø)	⬆️
... and 23 more

[mayurkale22]

Cool 👍

[OlivierAlbertini]

Nice!