classes/buildhistory: Do not sign buildhistory commits

This change adds the --no-gpg-sign option to prevent buildhistory
commits from failing due to GPG signing issues. Depending on the setup,
buildhistory may fail to create a commit if the user has the
commit.gpgsign option enabled.

For example, if the user creates a signing key that requires a password,
the commit won't be created and will fail with the following error:

/
|error: Enter passphrase: Load key "/home/<user>/.ssh/id_ed25519":
|incorrect passphrase supplied to decrypt private key?
|fatal: failed to write commit object
\

The bitbake command won't fail, but buildhistory won't have a commit.
Also, the commit may silently fail when building inside a container due
to missing packages or issues with accessing the GPG agent.

This is similar to [1], and signing the buildhistory commit
should be avoided to prevent such issues.

1 - https://git.openembedded.org/openembedded-core/commit/?id=7595a0a63a933af9dd9d1e458dc34a4ba80d9eae

(From OE-Core rev: 5294d15737e176ee96d9b590808ded2164386362)

Signed-off-by: Fabio Berton <fabio.berton@ctw.bmwgroup.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit a5e18714aee52db898aaf9d222fb5a4168bde96e)
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

meta/classes/buildhistory.bbclass

@@ -859,7 +859,7 @@ result: $result
 metadata revisions:
 END
 	cat ${BUILDHISTORY_DIR}/metadata-revs >> $commitmsgfile
-	git commit $commitopts -F $commitmsgfile --author "${BUILDHISTORY_COMMIT_AUTHOR}" > /dev/null
+	git commit --no-gpg-sign $commitopts -F $commitmsgfile --author "${BUILDHISTORY_COMMIT_AUTHOR}" > /dev/null
 	rm $commitmsgfile
 }