MM-45494: Add endpoint for message history (#20945)

* add api url

* write sql in store

* update app and client golang driver

* update layers and tests

* change sql query sort

* update layers

* fix style

* fix style post_store.go

* fix comments

* add test for app/post_test.go

* update layers

* fix test

* fix style

* fix style again :)

* add permission check

* add additional checks and tests

* change from nil to empty

* update app-layers

* fix style

* add index for OriginalId for Posts table

* fix postgres query

* update migration file names

* update app-layers

* address PR reviews

* write tests for post store

* fix style

* Update file name

* Update file name 2

* Update file name 3

* Update file name 4

* change the error orders

* update migration file name

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Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Mattermost Build <build@mattermost.com>

db/migrations/postgres/000102_posts_originalid_index.down.sql

@@ -0,0 +1 @@
+DROP INDEX IF EXISTS idx_posts_original_id;

db/migrations/postgres/000102_posts_originalid_index.up.sql

@@ -0,0 +1 @@
+CREATE INDEX IF NOT EXISTS idx_posts_original_id ON Posts(originalid);