chore: update Dockerfile.pytest to verify primary key fingerprint

Author: jdstrand

Dockerfile.pytest

@@ -7,7 +7,7 @@ FROM golang:latest
 #   Primary key fingerprint: 24C9 75CB A61A 024E E1B6  3178 7C3D 5715 9FC2 F927
 #   Subkey fingerprint:      9D53 9D90 D332 8DC7 D6C8  D3B9 D8FF 8E1F 7DF8 B07E
 ADD https://repos.influxdata.com/influxdata-archive.key ./influxdata-archive.key
-RUN echo '943666881a1b8d9b849b74caebf02d3465d6beb716510d86a39f6c8e8dac7515 influxdata-archive.key' | sha256sum -c && cat influxdata-archive.key | gpg --dearmor | tee /etc/apt/trusted.gpg.d/influxdata-archive.gpg > /dev/null
+RUN gpg --no-default-keyring --homedir /nonexistent --show-keys ./influxdata-archive.key | grep -q "24C975CBA61A024EE1B631787C3D57159FC2F927" && cat influxdata-archive.key | gpg --dearmor | tee /etc/apt/trusted.gpg.d/influxdata-archive.gpg > /dev/null
 
 RUN echo 'deb [signed-by=/etc/apt/trusted.gpg.d/influxdata-archive.gpg] https://repos.influxdata.com/debian stable main' | tee /etc/apt/sources.list.d/influxdata.list