[SPARK-36432][BUILD] Upgrade Jetty version to 9.4.43

### What changes were proposed in this pull request?
This PR upgrades Jetty version to `9.4.43.v20210629`.

### Why are the changes needed?
To address vulnerability https://nvd.nist.gov/vuln/detail/CVE-2021-34429 which affects Jetty `9.4.42.v20210604`.

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
CI

Closes #33656 from this/upgrade-jetty-9.4.43.

Lead-authored-by: Sajith Ariyarathna <[email protected]>
Co-authored-by: Sajith Ariyarathna <[email protected]>
Signed-off-by: Hyukjin Kwon <[email protected]>

Author: this

pom.xml

@@ -138,7 +138,7 @@
     <derby.version>10.14.2.0</derby.version>
     <parquet.version>1.12.0</parquet.version>
     <orc.version>1.6.9</orc.version>
-    <jetty.version>9.4.42.v20210604</jetty.version>
+    <jetty.version>9.4.43.v20210629</jetty.version>
     <jakartaservlet.version>4.0.3</jakartaservlet.version>
     <chill.version>0.10.0</chill.version>
     <ivy.version>2.5.0</ivy.version>