docs: group entries by scope in the v11.0.0 release info in `CHANGELOG.md` (#39704)
docs: group entries by scope in the v11.0.0 release info in `CHANGELOG.md` (#39704)

Usually, entries in the release notes for a version in `CHANGELOG.md` are
grouped by scope (i.e. all `compiler` changes together, all `router`
changes together, etc.). Currently, the notes for a non-patch release
are created manually, by contatenating the release notes for all
corresponding next/RC versions. As a result, the entries for v11.0.0 are
not grouped together.

This commit fixes it by grouping all entries for the v11.0.0 release by
scope, making it easier to identify all changes that affect a specific
package/scope.

PR Close #39704

blesh/angular,shairez/angular,ocombe/angular,mgechev/angular,brandonroberts/angular,manekinekko/angular,brandonroberts/angular,angular/angular,angular-indonesia/angular,ocombe/angular,blesh/angular,manekinekko/angular,brandonroberts/angular,blesh/angular,IdeaBlade/angular,IdeaBlade/angular,ocombe/angular,alxhub/angular,manekinekko/angular,alxhub/angular,JiaLiPassion/angular,IdeaBlade/angular,shairez/angular,alxhub/angular,gkalpak/angular,shairez/angular,angular-indonesia/angular,IdeaBlade/angular,brandonroberts/angular,angular/angular,gnomeontherun/angular,gkalpak/angular,shairez/angular,brandonroberts/angular,ocombe/angular,mgechev/angular,JiaLiPassion/angular,shairez/angular,mgechev/angular,gkalpak/angular,blesh/angular,alxhub/angular,manekinekko/angular,angular/angular,ocombe/angular,angular/angular,angular-indonesia/angular,JiaLiPassion/angular,mgechev/angular,manekinekko/angular,mgechev/angular,manekinekko/angular,ocombe/angular,brandonroberts/angular,gnomeontherun/angular,blesh/angular,alxhub/angular,angular-indonesia/angular,gkalpak/angular,gnomeontherun/angular,JiaLiPassion/angular,gnomeontherun/angular,IdeaBlade/angular