Simplified YAML files for Github Actions workflows

Updated actions where needed

.github/workflows/linux_build_tests.yaml

@@ -23,23 +23,19 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
     strategy:
-      max-parallel: 4
       matrix:
         package: [lz4, mpich, tut, py-setuptools, openjpeg, r-rcpp]
     steps:
     - uses: actions/checkout@v2
-    - name: Cache ccache's store
-      uses: actions/cache@v1
+    - uses: actions/cache@v2
       with:
         path: ~/.ccache
         key: ccache-build-${{ matrix.package }}
         restore-keys: |
           ccache-build-${{ matrix.package }}
-    - name: Setup Python
-      uses: actions/setup-python@v1
+    - uses: actions/setup-python@v2
       with:
         python-version: 3.8
     - name: Install System Packages

.github/workflows/linux_unit_tests.yaml

@@ -19,8 +19,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Setup Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+    - uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install System packages
@@ -56,8 +55,7 @@ jobs:
           share/spack/qa/run-unit-tests
           coverage combine
           coverage xml
-    - name: Upload to codecov.io
-      uses: codecov/codecov-action@v1
+    - uses: codecov/codecov-action@v1
       with:
         flags: unittests,linux
   shell:
@@ -98,7 +96,6 @@ jobs:
           COVERAGE: true
       run: |
           share/spack/qa/run-shell-tests
-    - name: Upload to codecov.io
-      uses: codecov/codecov-action@v1
+    - uses: codecov/codecov-action@v1
       with:
         flags: shelltests,linux

.github/workflows/macos_unit_tests.yaml

@@ -35,8 +35,7 @@ jobs:
         coverage run $(which spack) test
         coverage combine
         coverage xml
-    - name: Upload to codecov.io
-      uses: codecov/codecov-action@v1
+    - uses: codecov/codecov-action@v1
       with:
         file: ./coverage.xml
         flags: unittests,macos

.github/workflows/style_and_docs.yaml

@@ -11,13 +11,10 @@ on:
       - releases/**
 jobs:
   validate:
-
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v2
-    - name: Setup Python
-      uses: actions/setup-python@v1
+    - uses: actions/setup-python@v2
       with:
         python-version: 3.7
     - name: Install Python Packages