Disable macos tests in the CI

We'll re-enable them when actions/runner-images#4896 is fixed

.github/workflows/hardhat-core-ci.yml

@@ -46,6 +46,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-core on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-ethers-ci.yml

@@ -45,6 +45,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-ethers on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-etherscan-ci.yml

@@ -45,6 +45,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-etherscan on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-ganache-ci.yml

@@ -45,6 +45,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-ganache on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-shorthand-ci.yml

@@ -45,6 +45,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-shorthand on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-solhint-ci.yml

@@ -45,6 +45,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-solhint on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-solpp-ci.yml

@@ -29,6 +29,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-solpp on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-truffle4-ci.yml

@@ -47,6 +47,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-truffle4 on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-truffle5-ci.yml

@@ -47,6 +47,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-truffle5 on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-waffle-ci.yml

@@ -47,6 +47,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-waffle on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-web3-ci.yml

@@ -45,6 +45,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-web3 on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.github/workflows/hardhat-web3-legacy-ci.yml

@@ -45,6 +45,8 @@ jobs:
   test_on_macos:
     name: Test hardhat-web3-legacy on MacOS with Node 12
     runs-on: macos-latest
+    # disable until actions/virtual-environments#4896 is fixed
+    if: ${{ false }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2