ci: overwrite tmpdir in mac integration tests

The test `test_t3_instance_names_no_config` always fails because of very
long path in tmpdir. This test requires socket path with fexed length,
otherwise it can cause socket path buffer overflow.

After the patch tmpdir was overwritten to the shorter one.

Closes #931

.github/workflows/full-ci.yml

@@ -201,8 +201,10 @@ jobs:
       - name: Run unit tests
         run: mage unitfull
 
+      # We need to override TMPDIR here because of the very long path in macOS tests
+      # which causes a very long socket path error.
       - name: Integration tests
-        run: mage integrationfull
+        run: TMPDIR=/tmp mage integrationfull
 
       # Etcd can be still running after integration tests when:
       # 1. pytest recieve SIGALRM (can be caused by pytest-timeout plugin)

.github/workflows/tests.yml

@@ -197,8 +197,10 @@ jobs:
       - name: Unit tests
         run: mage unit
 
+      # We need to override TMPDIR here because of the very long path in macOS tests
+      # which causes a very long socket path error.
       - name: Run integration tests
-        run: mage integration
+        run: TMPDIR=/tmp mage integration
 
       # Etcd can be still running after integration tests when:
       # 1. pytest recieve SIGALRM (can be caused by pytest-timeout plugin)