packit.yaml: Use variables to make repo selection fully automatic

[mulkieran]

No description provided.

[packit-as-a-service]

We were not able to find or create Copr project packit/stratis-storage-libcryptsetup-rs-491 specified in the config with the following error:

Cannot create a new Copr project (owner=packit project=stratis-storage-libcryptsetup-rs-491 chroots=['fedora-rawhide-x86_64', 'fedora-43-x86_64', 'fedora-44-x86_64']): repos: copr://packit/{PACKIT_PROJECT_OWNER}-{PACKIT_PROJECT_NAME}-{pr_id}?priority=10 does not exist..

---

Unless the HTTP status code above is >= 500, please check your configuration for:

1. typos in owner and project name (groups need to be prefixed with @)
2. whether the project name doesn't contain not allowed characters (only letters, digits, underscores, dashes and dots must be used)
3. whether the project itself exists (Packit creates projects only in its own namespace)
4. whether Packit is allowed to build in your Copr project
5. whether your Copr project/group is not private

[packit-as-a-service]

We were not able to find or create Copr project packit/stratis-storage-libcryptsetup-rs-491 specified in the config with the following error:

Cannot create a new Copr project (owner=packit project=stratis-storage-libcryptsetup-rs-491 chroots=['fedora-44-x86_64', 'fedora-rawhide-x86_64', 'fedora-43-x86_64']): repos: copr://packit/{PACKIT_PROJECT_OWNER}-{PACKIT_PROJECT_NAME}-{pr_id}?priority=10 does not exist..

---

Unless the HTTP status code above is >= 500, please check your configuration for:

1. typos in owner and project name (groups need to be prefixed with @)
2. whether the project name doesn't contain not allowed characters (only letters, digits, underscores, dashes and dots must be used)
3. whether the project itself exists (Packit creates projects only in its own namespace)
4. whether Packit is allowed to build in your Copr project
5. whether your Copr project/group is not private

[mulkieran]

/packit build

[packit-as-a-service]

We were not able to find or create Copr project packit/stratis-storage-libcryptsetup-rs-491 specified in the config with the following error:

Cannot create a new Copr project (owner=packit project=stratis-storage-libcryptsetup-rs-491 chroots=['fedora-44-x86_64', 'fedora-rawhide-x86_64', 'fedora-43-x86_64']): repos: copr://packit/{PACKIT_PROJECT_OWNER}-{PACKIT_PROJECT_NAME}-{pr_id}?priority=10 does not exist..

---

Unless the HTTP status code above is >= 500, please check your configuration for:

1. typos in owner and project name (groups need to be prefixed with @)
2. whether the project name doesn't contain not allowed characters (only letters, digits, underscores, dashes and dots must be used)
3. whether the project itself exists (Packit creates projects only in its own namespace)
4. whether Packit is allowed to build in your Copr project
5. whether your Copr project/group is not private

[packit-as-a-service]

We were not able to find or create Copr project packit/stratis-storage-libcryptsetup-rs-491 specified in the config with the following error:

Cannot create a new Copr project (owner=packit project=stratis-storage-libcryptsetup-rs-491 chroots=['fedora-43-x86_64', 'fedora-44-x86_64', 'fedora-rawhide-x86_64']): repos: copr://packit/{PACKIT_PROJECT_OWNER}-{PACKIT_PROJECT_NAME}-{pr_id}?priority=10 does not exist..

---

Unless the HTTP status code above is >= 500, please check your configuration for:

1. typos in owner and project name (groups need to be prefixed with @)
2. whether the project name doesn't contain not allowed characters (only letters, digits, underscores, dashes and dots must be used)
3. whether the project itself exists (Packit creates projects only in its own namespace)
4. whether Packit is allowed to build in your Copr project
5. whether your Copr project/group is not private

[mulkieran]

If we specify PR repo as the highest priority build, then if the repo doesn't exist yet, build will fail. Otherwise, using it looks like using these variables would succeed.