Ship metainfo files with plugins

so we don't have to maintain them twice,
once here, once in flathub repo.

flatpak/org.gajim.Gajim.Plugin.omemo.yaml

@@ -64,7 +64,7 @@ modules:
         url: https://ftp.gajim.org/plugins_releases/omemo_2.6.75.zip
         sha256: 1e090db7efd4473238a2a658e57039b306e1152fa3ba9be5f7b5f3f22460decb
       - type: file
-        path: org.gajim.Gajim.Plugin.omemo.metainfo.xml
+        path: ../omemo/org.gajim.Gajim.Plugin.omemo.metainfo.xml
         sha256: 795eabeddcee3338a627f84068ee07e8221cca4ae91c08030ffb57fdcccf750b
       - type: shell
         commands:

flatpak/org.gajim.Gajim.Plugin.openpgp.yaml

@@ -23,7 +23,7 @@ modules:
         url: https://ftp.gajim.org/plugins_releases/openpgp_1.2.9.zip
         sha256: fa2e4eca694735a184359712dd6bfe30183aed5e17fc9b6b7d043ada9d444b15
       - type: file
-        path: org.gajim.Gajim.Plugin.openpgp.metainfo.xml
+        path: ../openpgp/org.gajim.Gajim.Plugin.openpgp.metainfo.xml
         sha256: 4769307f972aca3320311c1b0e514a7e41f1d1f437887147eb84ff1ec3245203
       - type: shell
         commands:

flatpak/org.gajim.Gajim.Plugin.pgp.yaml

@@ -24,7 +24,7 @@ modules:
         url: https://ftp.gajim.org/plugins_releases/pgp_1.2.42.zip
         sha256: f221642f8590c0ac0a90c0c5f8983485bd95a485fbfc5486dbdc67dc747358aa
       - type: file
-        path: org.gajim.Gajim.Plugin.pgp.metainfo.xml
+        path: ../pgp/org.gajim.Gajim.Plugin.pgp.metainfo.xml
         sha256: fa574af0b79ae62599d6d7c9c4016742de3b1b4b10890f66b096b7581dfe593d
       - type: shell
         commands:

flatpak/org.gajim.Gajim.Plugin.syntax_highlight.yaml

@@ -32,7 +32,7 @@ modules:
         url: https://ftp.gajim.org/plugins_releases/syntax_highlight_1.2.5.zip
         sha256: cae16ea749ac3a12341591078c1eb4b6fc6e7dc8123c0964a77adba8285d68dc
       - type: file
-        path: org.gajim.Gajim.Plugin.syntax_highlight.metainfo.xml
+        path: ../syntax_highlight/org.gajim.Gajim.Plugin.syntax_highlight.metainfo.xml
         sha256: 46bff3ab0a5d97a252652b5d2224e973f4f9e5bdffb9a7a9196b07fca0255957
       - type: shell
         commands:

flatpak/org.gajim.Gajim.Plugin.url_image_preview.yaml

@@ -24,7 +24,7 @@ modules:
         url: https://ftp.gajim.org/plugins_releases/url_image_preview_2.4.2.zip
         sha256: cd49437b8847f58842b1e0da4b57962ae4ee7feb7fbb831c17e56dfbdf0d2b6e
       - type: file
-        path: org.gajim.Gajim.Plugin.url_image_preview.metainfo.xml
+        path: ../url_image_preview/org.gajim.Gajim.Plugin.url_image_preview.metainfo.xml
         sha256: 4e4966951ae64ef6c6ae159cc2f46195e6f8d42677d7b059f06816c661400f43
       - type: shell
         commands: