Enable doc-validator for specific directories (#63524)

* Enable doc-validator for specific directories

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix one linting error to trigger CI

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Update doc-validator to latest release

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Update make-docs procedure

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Use doc-validator version from CI in local make target

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Revert to 1.11.0

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* adds missing descriptions

* Fix titles and headings

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix link formats

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix easy to resolve anchors

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Remove broken anchor link

This anchor appears to have been broken for a long time.

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Use doc-validator image with support for numbered anchors

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Update make-docs procedure to support doc-validator 2.0.x

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix a bunch of broken anchors

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Ignore old whatsnew content

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Update doc-validator to v2.0.x and use reviewdog to report errors

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* removes broken links

---------

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>
Co-authored-by: Chris Moyer <chris.moyer@grafana.com>

docs/variables.mk

@@ -1,2 +1,5 @@
 # List of projects to provide to the make-docs script.
 PROJECTS = grafana
+
+# Use the doc-validator image defined in CI by default.
+export DOC_VALIDATOR_IMAGE := $(shell sed -En 's, *image: "(grafana/doc-validator[^"]+)",\1,p' "$(shell git rev-parse --show-toplevel)/.github/workflows/doc-validator.yml")