Deseng 617 screen reader improvements

[Baelx]

Issue #: https://citz-gdx.atlassian.net/browse/DESENG-617

Description of changes:

• Update markup to be more semantic
• Improve aria labelling
• Add aria live announcer for dynamic search result updates

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 75.94%. Comparing base (ae08700) to head (5b55440).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2549 +/- ## ======================================= Coverage 75.94% 75.94% ======================================= Files 608 608 Lines 21991 21997 +6 Branches 1709 1710 +1 ======================================= + Hits 16700 16706 +6 Misses 5028 5028 Partials 263 263 ``` | [Flag](https://app.codecov.io/gh/bcgov/met-public/pull/2549/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov) | Coverage Δ | | |---|---|---| | [metweb](https://app.codecov.io/gh/bcgov/met-public/pull/2549/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov) | `64.73% <91.66%> (+0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/bcgov/met-public/pull/2549?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov) | Coverage Δ | | |---|---|---| | [met-web/src/components/common/Input/Button.tsx](https://app.codecov.io/gh/bcgov/met-public/pull/2549?src=pr&el=tree&filepath=met-web%2Fsrc%2Fcomponents%2Fcommon%2FInput%2FButton.tsx&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov#diff-bWV0LXdlYi9zcmMvY29tcG9uZW50cy9jb21tb24vSW5wdXQvQnV0dG9uLnRzeA==) | `94.18% <ø> (ø)` | | | [met-web/src/components/landing/FilterBlock.tsx](https://app.codecov.io/gh/bcgov/met-public/pull/2549?src=pr&el=tree&filepath=met-web%2Fsrc%2Fcomponents%2Flanding%2FFilterBlock.tsx&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov#diff-bWV0LXdlYi9zcmMvY29tcG9uZW50cy9sYW5kaW5nL0ZpbHRlckJsb2NrLnRzeA==) | `75.00% <100.00%> (+0.71%)` | :arrow_up: | | [met-web/src/components/landing/FilterDrawer.tsx](https://app.codecov.io/gh/bcgov/met-public/pull/2549?src=pr&el=tree&filepath=met-web%2Fsrc%2Fcomponents%2Flanding%2FFilterDrawer.tsx&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov#diff-bWV0LXdlYi9zcmMvY29tcG9uZW50cy9sYW5kaW5nL0ZpbHRlckRyYXdlci50c3g=) | `48.00% <ø> (ø)` | | | [met-web/src/components/landing/TileBlock.tsx](https://app.codecov.io/gh/bcgov/met-public/pull/2549?src=pr&el=tree&filepath=met-web%2Fsrc%2Fcomponents%2Flanding%2FTileBlock.tsx&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bcgov#diff-bWV0LXdlYi9zcmMvY29tcG9uZW50cy9sYW5kaW5nL1RpbGVCbG9jay50c3g=) | `91.66% <90.00%> (+1.66%)` | :arrow_up: |

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud