fix: resolved load more posts delay issue

[awais-ansari]

INF-1090

Description I noticed in Hotjar recordings that the “Load more posts” button is very slow and gets even slower with successive clicks. I’ve attached a recording of a test I conducted.

• First, load more clicks: API response takes 983 msec but it takes 6 seconds to load 10 new posts in the UI. :open_mouth:
• 12th load more click: API response takes 816 msec but it takes 42 seconds to load 10 new posts in the UI. :exploding_head: It seems like the API call is sent 14 seconds after the button clicks. https://www.loom.com/share/c2e296f135734a6389a238768d6e4602?sid=d0c0d7cb-7e9c-4cc5-b519-99c3c31bf9ad

Implementation

• Component is optimized and every Post item is rendered one time.
• The post item component was using the Truncate component to truncate the post title and preview. Which was taking too much time.
• Our use cases are simple. So truncated the post title and preview using Bootstrap classes.

https://www.loom.com/share/4453d72e480243888de2a89cf206ce8f?sid=4f0da169-c032-4f40-99f5-ae6800f6b7aa

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (7d7221b) 92.32% compared to head (47e1477) 92.37%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #602 +/- ## ========================================== + Coverage 92.32% 92.37% +0.05% ========================================== Files 169 169 Lines 3451 3450 -1 Branches 899 898 -1 ========================================== + Hits 3186 3187 +1 + Misses 244 243 -1 + Partials 21 20 -1 ``` | [Files](https://app.codecov.io/gh/openedx/frontend-app-discussions/pull/602?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx) | Coverage Δ | | |---|---|---| | [src/discussions/posts/post/PostLink.jsx](https://app.codecov.io/gh/openedx/frontend-app-discussions/pull/602?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-c3JjL2Rpc2N1c3Npb25zL3Bvc3RzL3Bvc3QvUG9zdExpbmsuanN4) | `96.77% <85.71%> (+6.14%)` | :arrow_up: |

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