[stable-4.7] Rename master to main in workflows and docs

[himdel]

and sometimes to stable-4.7 when it makes sense to prefer over main

---

AAH-2643

4.2: #4125
4.5: #4124
4.6: #4123
4.7: #4122
master/main: #4126

[himdel]

(Intentionally) remaining master references:

src/containers/legacy-roles/legacy-role.tsx
162:            description={t`The role is versionless and will always install from the head/main/master branch.`}