Quarantine spec/features/nav/top_nav_tooltip_spec.rb spec/features/broadcast_messages_spec.rb

What does this MR do and why?

This MR quarantines the following flaky specs until we find a solution:

• top_nav_tooltip_spec.rb
• spec/features/broadcast_messages_spec.rb

top_nav_tooltip_spec.rb - #382786 (closed)

This spec failed in the following master broken incidents:

• #3327595040 in gitlab-org/quality/engineering-productivity/master-broken-incidents#159 (closed) in gitlab-foss
• #3327305861 in gitlab-org/quality/engineering-productivity/master-broken-incidents#160 (closed) in gitlab

spec/features/broadcast_messages_spec.rb - #347118 (closed)

This spec failed in the following master broken incidents:

• #3327310903 in gitlab-org/quality/engineering-productivity/master-broken-incidents#158 (closed)
• #3328190224 in gitlab-org/quality/engineering-productivity/master-broken-incidents#161 (closed)

Related to #382786 (closed) and #347118 (closed)

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.