Move ldmx-sw versioning to dedicated file

[tvami]

I am updating ldmx-sw, here are the details.

What are the issues that this addresses?

This is a follow up to #1539 (comment)

Check List

• I successfully compiled ldmx-sw with my developments
• I ran my developments and the following shows that they are successful.

Locally this works, for github we are testing on the fly...

[tomeichlersmith]

Just some other updates.

• We could move the reading of the VERSION file earlier in the CMake so that the CMake can be informed of the VERSION as well.
  Right now, CMake thinks we are pretty old

ldmx-sw/CMakeLists.txt

Line 18 in b319599

project(LDMX_SW VERSION 3.1.1

Not sure if we can set the version with a variable value though.

• Update the function that prints the gold label to just dump this file.

ldmx-sw/.github/actions/common.sh

Line 25 in b319599

cat ${LDMX_GOLD_LABEL_FILE}

• update to copy the VERSION along with the golds from trunk

ldmx-sw/.github/workflows/pr_validation.yml

Line 38 in b319599

run: git checkout origin/trunk -- .github/validation_samples/*/gold.root .github/actions/validate/gold_label

[tomeichlersmith]

I'm just trying to remove the gold_label so that it doesn't confuse anyone in the future. I think these are the necessary edits and then we can just git rm .github/actions/validate/gold_label.

[tomeichlersmith]

One last more cosmetic thing: we could update the patch number now to keep it consistent or just do another patch release to help test it.

[tvami]

just do another patch release to help test it.

I'll add the tracking to ecal veto next, we can cut a patch release after that which can also act as a test for this