ORC-1656: Skip build and test on conan updates

### What changes were proposed in this pull request?
This PR aims to skip build and test on conan updates

### Why are the changes needed?
To save community resources from running tests on irrelevant changes.

#1846 (review)

### How was this patch tested?
GA

### Was this patch authored or co-authored using generative AI tooling?
No

Closes #1847 from cxzl25/ORC-1656.

Authored-by: sychen <sychen@ctrip.com>
Signed-off-by: William Hyun <william@apache.org>

.github/workflows/build_and_test.yml

@@ -4,11 +4,13 @@ on:
   push:
     paths-ignore:
     - 'site/**'
+    - 'conan/**'
     branches:
     - main
   pull_request:
     paths-ignore:
     - 'site/**'
+    - 'conan/**'
     branches:
     - main