Merge pull request OpenFAST#2121 from OpenFAST/rc-3.5.3

Summary of all PR's included in this merge (PR OpenFAST#2121):

* Add 4 linearization regression tests
* Upgrade to setup-python@v5 and cache@v4 for GH actions
* Update fast_linearization_file.py to use less memory
* Use env var to set CTest parallel runs, reduce to 2
* Use more efficient method to compare linearization matrices in regression tests.
* Fix printing bug in Python Linear Regression test script
* GH actions: upgrade upload-artifact to v4
* Fix bug in HD_Perturb_x where SS_Exctn%numStates was used instead of SS_Rdtn%numStates
* GH actions: upgrade checkout to v4 and setup-python to v5
* Remove typo in warning, retains c/con option for output flags for backwards compatibility
* Bathymetry grid bug and slope normal vector bug fix
* Change input string size for bathgrid and waterkin
* Lin tests: increase out precision, error printing full filename
* Add SubDyn Linearization test case
* Lin: incorrect BD index in dUdy for AD motion
* Lin: sum BD blade root motion to hub moment m_ud term (consistent with documentation)
* Fix bug in BD linearization resulting from reference rotation change
* Improve handling of Paths for SrvD UserSubs Input Files
* Revert " Resolve BeamDyn initial strain for rotated blade"
* BeamDyn: Disable changing the reference frame
* BeamDyn: Implement new initial strain fix based on OpenTurbine documentation
* SrvD: fix typo in registry from PR OpenFAST#2079
* BeamDyn: Restore previous fix to pitch actuator logic in SetParameters
* FASTlib: Turbine(:) array must use Fortran index 1 start
* FASTlib: change ExternInitData%TurbineID to %TurbIDforName
* FASTlib: change iTurb inputs to routines with c-bindings to index 0
* Set 5MW_Land_DLL_WTurb_cpp as a CPP_API test, not CPP_DRIVER
* Adjust if statements in FAST_OpFM_Step for iTurb being in range 1:NumTurbines.
* CPP testing: fix logic setting exec name in CMakeList.txt
* TurbSim: increase filename to 1024 characters
* VSbuild: always build Registry as release x64
* Add initialization of MHK, WtrDpth, MSL2SWL in IfW_InitInp for AWAE module
* Use of potentially unallocated array in AeroDyn_AllBldNdOuts.
* VSbuild: increase stack size for FAST.Farm
* CMake: openmp optional for FF and CPP if not explicitly requested (OpenFAST#2120)
* Update docs for release 3.5.3

.dockerignore

@@ -0,0 +1,26 @@
+# System, cache and editor files
+**/__pycache__
+**/.DS_Store
+
+.editorconfig
+.idea
+.git
+.github
+.gitignore
+.pytest_cache
+.pre-commit-config.yaml
+.readthedocs.yml
+.coverage
+Procfile
+README.md
+
+# Never bake in environment variables
+.env
+.env*
+google_credentials.json
+# See: https://github.com/google-github-actions/auth/issues/123
+gha-creds-*.json
+gcp-creds-*.json
+
+.devcontainer/.zsh_history
+share/docker