[release/5.0] Rebrand for v5.0.8 and get builds working

[dougbu]

• [release/5.9] Update branding to v5.0.8

  • disable baseline validation

• [release/5.0] Update cert that became valid and broke tests

  • backport of 2e20bab (Update cert that became valid and broke tests #32812)
  • dupe of [release/5.0] Update cert that became valid and broke tests #33033

  • Update cert to not be valid for 50 years

  • Make cert valid in 10 years

  • Delete unused copy of certs, update right one

  • Skip test for now

• [release/5.0] Update Chrome driver

  • backport of e7b5aa6 (Update Chrome driver #33019)

• [release/5.0] Update selenium chrome driver

  • backport of af96aba (Update selenium chrome driver #33043)

[dougbu]

@HaoK I'm ignoring #33033 though I included the final #32812 commit. Will thus be able to keep the pieces separate when I merge (not squash).