oeqa/selftest/gitarchive: add tests about tags lisiting when no remote is configured

oeqa/selftest/gitarchive: add tests about tags lisiting when no remote is configured

Add specific tests on gitarchive for when tag listing is required but no
remote is configured in target directory: it should either succeed if valid
url is provided, or fail is url is not provided or wrong

Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>