i#7253 submodule fail: Try actions/checkout@v4

[derekbruening]

Updates the actions/checkout to v4 in all our workflows in an attempt to avoid the submodule failures we've seen recently.

Issue: #7253

[derekbruening]

Going to go ahead and merge this to see if the post-merge works; we can re-run the post-merge tests a few times and see if it remains green.

[derekbruening]

It was all green on master merge: https://github.com/DynamoRIO/dynamorio/actions/runs/13191268308/job/36824537297
I will now re-run the 3 aarch tests.

[derekbruening]

Green on re-run: https://github.com/DynamoRIO/dynamorio/actions/runs/13191268308

Trying a 3rd time: if green will declare that this is the fix.

[derekbruening]

Green a 3rd time: https://github.com/DynamoRIO/dynamorio/actions/runs/13191268308

[ivankyluk]

I got the same error with actions/checkout@v4: https://github.com/DynamoRIO/dynamorio/actions/runs/13204570399/job/36864603044?pr=7255

Run actions/checkout@v4
Syncing repository: DynamoRIO/dynamorio
Getting Git version info
  Working directory is '/opt/actions-runner/_work/dynamorio/dynamorio'
  /usr/bin/git version
  git version 2.25.1
  :
Fetching submodules
  /usr/bin/git submodule sync
  /usr/bin/git -c protocol.version=2 submodule update --init --force --depth=1
  Submodule 'third_party/elfutils' (https://sourceware.org/git/elfutils.git) registered for path 'third_party/elfutils'
  Submodule 'third_party/libipt' (https://github.com/intel/libipt.git) registered for path 'third_party/libipt'
  Submodule 'third_party/zlib' (https://github.com/madler/zlib.git) registered for path 'third_party/zlib'
  Cloning into '/opt/actions-runner/_work/dynamorio/dynamorio/third_party/elfutils'...
  Cloning into '/opt/actions-runner/_work/dynamorio/dynamorio/third_party/libipt'...
  Cloning into '/opt/actions-runner/_work/dynamorio/dynamorio/third_party/zlib'...
  Error: error: RPC failed; curl 16 Error in the HTTP2 framing layer
  Error: fatal: the remote end hung up unexpectedly
  Fetched in submodule path 'third_party/elfutils', but it did not contain c1058da5a450e33e[72](https://github.com/DynamoRIO/dynamorio/actions/runs/13204570399/job/36864603044?pr=7255#step:2:81)b72abb53bc3ffd7f6b361b. Direct fetching of that commit failed.
  Error: The process '/usr/bin/git' failed with exit code 1