Revert "deps: V8: override depot_tools version"

[richardlau]

This reverts commit abff716.

No longer required as the override points to the same commit sha of depot_tools as deps/v8/DEPS.

---

This change only affects node-test-commit-v8-linux or make test-v8.

For context. we needed to roll to a newer version of depot_tools on older Node.js release lines for Python 3.12 compatibility in #62344. I noted at the time:

cc @nodejs/v8-update

This will need to be cherry-picked onto all release lines that we want to run the V8 CI on as it is necessary to run on Ubuntu 24.04 where the default Python 3 is 3.12.

We should also undo it with/after #61898 (or newer V8) as that will set a new enough version of depot_tools to be Python 3.12 compatible.

All of these point to depot_tools@284c5ccb591c3de4e9f71be4a4beb5d1916d5383 so the override is not needed on main and v26.x-staging:

main:

• node/tools/v8/fetch_deps.py

  Lines 27 to 28 in afbfccc

  	# Update depot_tools for compatibility with Python 3.12.
  	"v8/third_party/depot_tools" : "https://chromium.googlesource.com/chromium/tools/depot_tools.git@284c5ccb591c3de4e9f71be4a4beb5d1916d5383",

• node/deps/v8/DEPS

  Lines 228 to 229 in afbfccc

  	'third_party/depot_tools':
  	Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '284c5ccb591c3de4e9f71be4a4beb5d1916d5383',

v26.x-staging:

• node/deps/v8/DEPS

  Lines 228 to 229 in da341e2

  	'third_party/depot_tools':
  	Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '284c5ccb591c3de4e9f71be4a4beb5d1916d5383',

Even worse, leaving the override would result in an older version of depot_tools than in deps/v8/DEPS from newer versions of V8 (e.g. #65161).

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=benchmark-ubuntu2404-intel-64,v8test=v8test/7387/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-s390x,v8test=v8test/7387/

[nodejs-github-bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-power9le,v8test=v8test/7387/