ci: remove dev-infra as owner on material-ci folder (#28990)

Currently, whenever someone on fw-core approvals list approves a change
to the angular_material_blocklist.js file, it is not sufficient because
dev-infra is also requested as a mandatory reviewer. This does not make
sense because this folder only contains the list of ignored tests and
not anything dev-infra related.

Previously, we tried to fix this by creating a "Material CI" section
underneath the existing "Build & CI" section, so that the "Material CI"
rule would override the rule matching the entire "tools" folder.
Unfortunately, this did not work. This commit attempts to resolve the
problem by explicitly marking all sub-folders in the "tools" folder
as owned by dev-infra (leaving out "material-ci"), so "material-ci"
is only referenced by the rule assigning fw-core as code owners.

PR Close #28990

.github/CODEOWNERS

@@ -750,14 +750,29 @@ testing/**                                                      @angular/fw-test
 /packages/*                                                     @angular/fw-dev-infra
 /scripts/**                                                     @angular/fw-dev-infra
 /third_party/**                                                 @angular/fw-dev-infra
-/tools/**                                                       @angular/fw-dev-infra
+/tools/build/**                                                 @angular/fw-dev-infra
+/tools/cjs-jasmine/**                                           @angular/fw-dev-infra
+/tools/gulp-tasks/**                                            @angular/fw-dev-infra
+/tools/ngcontainer/**                                           @angular/fw-dev-infra
+/tools/npm/**                                                   @angular/fw-dev-infra
+/tools/npm_workspace/**                                         @angular/fw-dev-infra
+/tools/public_api_guard/**                                      @angular/fw-dev-infra
+/tools/rxjs/**                                                  @angular/fw-dev-infra
+/tools/source-map-test/**                                       @angular/fw-dev-infra
+/tools/symbol-extractor/**                                      @angular/fw-dev-infra
+/tools/testing/**                                               @angular/fw-dev-infra
+/tools/ts-api-guardian/**                                       @angular/fw-dev-infra
+/tools/tslint/**                                                @angular/fw-dev-infra
+/tools/validate-commit-message/**                               @angular/fw-dev-infra
+/tools/yarn/**                                                  @angular/fw-dev-infra
+/tools/*
 *.bzl                                                           @angular/fw-dev-infra
 
 # ================================================
 #  Material CI
 # ================================================
 
-/tools/material-ci/**                                           @angular/fw-core @angular/fw-dev-infra
+/tools/material-ci/**                                           @angular/fw-core @angular/framework-global-approvers
 
 
 # ================================================