Update codeql analysis frequency

[MadVikingGod]

Update CodeQL analysis to run on pushes to main, and PR to follow the recommendation of the Security Sig #4459.

[codecov]

Codecov Report

Merging #4542 (f9162a2) into main (fd8eff8) will decrease coverage by 0.1%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##            main   #4542     +/-   ##
=======================================
- Coverage   81.3%   81.3%   -0.1%     
=======================================
  Files        220     220             
  Lines      17679   17679             
=======================================
- Hits       14386   14384      -2     
- Misses      2992    2994      +2     
  Partials     301     301             

[pellared]

Update CodeQL analysis to run on pushes to main, and PR to follow the recommendation of the Security Sig #4459.

We need to do the same for https://github.com/open-telemetry/opentelemetry-go-contrib/blob/main/.github/workflows/codeql_analysis.yml

[MrAlias]

Merging prior to 1 day to include this in the evaluation of other PRs and since it is a trivial change.