3021: Reduce CI runtime

[steffenkleinle]

Short description

Reduce CI runtime by removing browserstack upload and e2e tests from commits on main and web e2e tests from normal commits.

Proposed changes

• Add native_browserstack workflow to manually deliver android and ios to browserstack
• Remove browserstack upload from commit_main
• Remove automatic runs of e2e_tests for commits on main (-> e2e tests are only run before deliveries)
• Remove e2e_web from commit workflow
• Remove build_ig_test_cms_web where not necessary (not needed for web e2e tests)
• Update docs

Side effects

• e2e tests are not run automatically for commits on main and should be triggered manually if necessary (still running for deliveries though)
• native builds are not uploaded to browerstack automatically anymore (can be triggered manually using new native_browserstack workflow

Testing

None, just have a look at the CI.

Resolved issues

Fixes: #3021

Additonal context

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[LeandraH]

Looks great! It's really wonderful to see this number!

Just to clarify, the delivery workflow delivers web and native to beta, and to get from beta to production, we need to start web_production_delivery and native_production_delivery separately, correct?

[steffenkleinle]

Looks great! It's really wonderful to see this number!

Just to clarify, the delivery workflow delivers web and native to beta, and to get from beta to production, we need to start web_production_delivery and native_production_delivery separately, correct?

Nope, for this the promotion workflow is for :) web and native production delivery workflows directly deliver a new version to production without beta testing in between