Ignore the str field of ast.Interpolation #546

Job	Run time
Linting	30s
Test Windows (3.6)	1m 21s
Test Windows (3.8)	1m 32s
Test Windows (2.7)	1m 24s
Test Windows (3.14)	1m 52s
Test (python2.7)	22s
Test Windows (3.7)	1m 16s
Test Windows (3.11)	56s
Test Windows (3.10)	1m 3s
Test Windows (3.9)	40s
Test Windows (3.13)	48s
Test Windows (3.12)	45s
Test (python3.3)	25s
Test (python3.7)	23s
Test (python3.6)	24s
Test (python3.5)	26s
Test (python3.13)	40s
Test (python3.11)	1m 53s
Test (python3.10)	35s
Test (python3.4)	28s
Test (pypy3)	33s
Test (pypy)	29s
Test (python3.14)	39s
Lint Dockerfiles (Dockerfile-fedora32)	10s
Test (python3.9)	27s
Lint Dockerfiles (Dockerfile-fedora38)	14s
Test (python3.12)	54s
Lint Dockerfiles (Dockerfile-fedora34)	15s
Lint Dockerfiles (Dockerfile-fedora36)	11s
Lint Dockerfiles (Dockerfile-fedora30)	12s
Lint Dockerfiles (Dockerfile-fedora28)	7s
Test (python3.8)	22s
Lint Dockerfiles (Dockerfile-fuzz)	12s
Lint Dockerfiles (Dockerfile-fedora42)	15s
Lint Dockerfiles (Dockerfile-fedora40)	12s
	22m 55s

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