Python to 3.8.6

Closes gitlab-org/charts/gitlab#2538

See merge request gitlab-org/build/CNG!602

Add -ubi8 to commit ref if UBI_PIPELINE is set

See merge request gitlab-org/build/CNG!600

Patch Ruby 2.7 with counting memory allocations

See merge request gitlab-org/build/CNG!591

Disable disk access of Pages

Closes gitlab-org/charts/gitlab#2570

See merge request gitlab-org/build/CNG!597

Signed-off-by: Balasankar "Balu" C <balasankarc@autistici.org>

Push UBI images to RedHat registry

Closes gitlab-org/gl-openshift/gitlab-operator#50

See merge request gitlab-org/build/CNG!571

Apply git ref performance patches

See merge request gitlab-org/build/CNG!596

Remove omnibus from docker-compose

See merge request gitlab-org/build/CNG!594

Bump gitlab-exporter to 10.0.0

See merge request gitlab-org/build/CNG!588

See https://gitlab.com/gitlab-org/gitlab-exporter/-/tags/v10.0.0

- Ruby 2.7
- Run GC after each request
- Various performance improvements
- a new Ruby GC probe

Remove Git patch that is no longer needed

See merge request gitlab-org/build/CNG!592

Add script to register OAuth applications on deployment

See merge request gitlab-org/build/CNG!590

Signed-off-by: Balasankar "Balu" C <balasankarc@autistici.org>

Bump Container Registry Version to v3.0.0

See merge request gitlab-org/build/CNG!589

Fix gitlab logger 'if' condition in sidekiq process-wrapper

See merge request gitlab-org/build/CNG!593

Without the extra space, causes:
/scripts/process-wrapper: line 5: [: missing `]'

although thankfully the script then continues on to the 'else', it just means it's not possible to actually use the new logger