Fixes #1.

____________ TestIdentity.test_introspect_signed_id_token_0_success ____________
[gw16] linux -- Python 3.11.6 /usr/bin/python

a = (<tests.integration_tests.api.secrets_engines.test_identity.TestIdentity testMethod=test_introspect_signed_id_token_0_success>,)

    @wraps(func)
    def standalone_func(*a):
>       return func(*(a + p.args), **p.kwargs)

/usr/lib/python3.11/site-packages/parameterized/parameterized.py:533:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
tests/integration_tests/api/secrets_engines/test_identity.py:2152: in test_introspect_signed_id_token
    self.client.secrets.identity.create_or_update_role(
hvac/api/secrets_engines/identity.py:1478: in create_or_update_role
    return self._adapter.post(
hvac/adapters.py:159: in post
    return self.request("post", url, **kwargs)
hvac/adapters.py:408: in request
    response = super().request(*args, **kwargs)
hvac/adapters.py:376: in request
    self._raise_for_error(method, url, response)
hvac/adapters.py:294: in _raise_for_error
    utils.raise_for_error(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

method = 'post', url = 'https://127.0.0.1:50299/v1/identity/oidc/role/hvac'
status_code = 400, message = None, errors = ['cannot find key "hvac_key"']
text = '{"errors":["cannot find key \\"hvac_key\\""]}\n'
json = {'errors': ['cannot find key "hvac_key"']}

    def raise_for_error(
        method, url, status_code, message=None, errors=None, text=None, json=None
    ):
        """Helper method to raise exceptions based on the status code of a response received back from Vault.

        :param method: HTTP method of a request to Vault.
        :type method: str
        :param url: URL of the endpoint requested in Vault.
        :type url: str
        :param status_code: Status code received in a response from Vault.
        :type status_code: int
        :param message: Optional message to include in a resulting exception.
        :type message: str
        :param errors: Optional errors to include in a resulting exception.
        :type errors: list | str
        :param text: Optional text of the response.
        :type text: str
        :param json: Optional deserialized version of a JSON response (object)
        :type json: object

        :raises: hvac.exceptions.InvalidRequest | hvac.exceptions.Unauthorized | hvac.exceptions.Forbidden |
            hvac.exceptions.InvalidPath | hvac.exceptions.RateLimitExceeded | hvac.exceptions.InternalServerError |
            hvac.exceptions.VaultNotInitialized | hvac.exceptions.BadGateway | hvac.exceptions.VaultDown |
            hvac.exceptions.UnexpectedError

        """
>       raise exceptions.VaultError.from_status(
            status_code,
            message,
            errors=errors,
            method=method,
            url=url,
            text=text,
            json=json,
        )
E       hvac.exceptions.InvalidRequest: cannot find key "hvac_key", on post https://127.0.0.1:50299/v1/identity/oidc/role/hvac

hvac/utils.py:41: InvalidRequest

mock dropped as part of
https://github.com/hvac/hvac/pull/1119

Only buildbot uses python-hvac, and its tests are still green. Maybe I will move it soon.

* python-pyhcl is optional again https://github.com/hvac/hvac/pull/1060
* Cherry-pick a fix for vault 1.15 compatibilty. Fixes https://bugs.archlinux.org/task/80286
* Patch for unittest.mock. See: https://archlinux.org/todo/drop-python-mock-checkdepends/

* Drop merged patch

* Add more comments for incompatibility with Flask 2.3

Also switches to upstream changes for compatibility with newer vault. I
use a local patch due to git conflicts, and apparently not all changes
are required.

See: https://github.com/hvac/hvac/pull/1023

See: https://github.com/hvac/hvac/pull/822

See: https://github.com/hvac/hvac/issues/905

* Switch to PEP517 as upstream switches to poetry https://github.com/hvac/hvac/pull/854
* python-pyhcl is now required instead of optional after the PR above
* Re-enable most integration tests after upstream fixes - see https://github.com/hvac/hvac/issues/852 and related pull requests

See: https://github.com/hvac/hvac/issues/786#issuecomment-1180624595

manually rebuild for Python 3.10 - somehow "localhost" does not resolve to 127.0.0.1 and ::1 on rebuilders, apparently

The prepare function requires vault to be installed, so it needs to be moved to makedepends.

[1] https://github.com/buildbot/buildbot/pull/6058