make claims cacher safe for concurrent use

the lru.cache is not safe for concurrent access so protect it's use with
a mutex

Signed-off-by: chrisfarms <[email protected]>

web: behaviour: hamburger icon shows closed state when no pipelines

Signed-off-by: Aidan Oldershaw <[email protected]>
Co-authored-by: Bohan Chen <[email protected]>

Merge pull request concourse#5926 from concourse/6.4.x/gitlab-auth

6.4.x - Update go mod with latest changes in concourse/dex

Merge pull request concourse#5934 from concourse/bosh-topgun-fix-6.3.x

topgun: Fix regex to support bosh 6.x

Merge pull request concourse#5884 from concourse/fix-bosh-topgun

Fix bosh topgun

Merge pull request concourse#5749 from concourse/fix-fly-login

Admins should be able to login to any team

Merge pull request concourse#5670 from concourse/issue/5624

fly: tell user when team is invalid

Merge pull request concourse#5548 from concourse/issue/5536

automatically fill system-claim-values

topgun/k8s: fix env vars in external worker tests

The old approach was setting the 'authorized keys' env var to an empty string --
this is different from un-setting it, and with our stricter env var validation
this setting was causing the web nodes to crash.

Signed-off-by: Jamie Klassen <[email protected]>

Merge pull request concourse#5363 from concourse/fix-offline-first

web: behaviour: bound cached jobs to 1000