Prepare for Flux v2.1.1

[stefanprodan]

Flux v2.1.1 is a patch release that comes with fixes to issues reported by users who upgraded to v2.1.0.

📅 Target dates: 18-21 Sep 2023

Fixes:

• helmrepo: fix Secret type check for TLS via .spec.secretRef source-controller#1220
• bucket: Use auto lookup type source-controller#1211
• Fix push branch reporting when is equal to checkout branch image-automation-controller#581
• runner: address regression in captured Helm logs helm-controller#767
• Check source for nil artifact before loading chart helm-controller#768
• Update description of kubeconfig specific flag #4226
• controller: use DefaultServiceAccount in differ helm-controller#774

Git FS updates:

• git/gogit: Replaces fs with upstream osfs.BoundOS pkg#650
• [release/v1.1.x] Upgrade github.com/fluxcd/pkg/{git,git/gogit} source-controller#1236
• Upgrade github.com/fluxcd/pkg/{git,git/gogit} image-automation-controller#586
• [release/v2.1.x] Upgrade github.com/fluxcd/pkg/{git,git/gogit} #4249

AUR improvements:

• chore: remove support armv6h for aur package #4233
• Improve AUR package templates #4228

Release checklist:

• source-controller v1.1.1
• helm-controller v0.36.1
• image-automation-controller v0.36.1
• flux2 v2.1.1
• terraform-provider-flux v1.1.1