* add synchronous local file read

* add tests

* add support for apply from statements

* add safeguard to prevent breakout from localDir

* add safeguard to allow "apply from" only with official Gradle file types

* fix: use async io

* fix test coverage

* Update lib/modules/manager/gradle/extract.spec.ts

Co-authored-by: Sergei Zharinov <zharinov@users.noreply.github.com>

* Update lib/modules/manager/gradle/extract.spec.ts

Co-authored-by: Sergei Zharinov <zharinov@users.noreply.github.com>

* Update lib/modules/manager/gradle/extract.spec.ts

Co-authored-by: Sergei Zharinov <zharinov@users.noreply.github.com>

* re-add try/catch

* add istanbul ignore

* Update lib/modules/manager/gradle/parser.ts

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* fs tests: remove obsolete block

* remove istanbul ignore next

* Update lib/modules/manager/gradle/extract.ts

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

* tests: replace mockImplementationOnce() with mockRejectedValueOnce()

* scriptFile: explicitly set null for undefined values

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Co-authored-by: Rhys Arkins <rhys@arkins.net>
Co-authored-by: Sergei Zharinov <zharinov@users.noreply.github.com>
Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>