removing thread local in geospatial (#1102)

## Description
Removing thread local in geospatial wkt converter. 

Cleaning up thread local objects is currently missing in the codebase.
We need to update the implementation to create new instance for every
usage of wkb/wkt reader as part of future geospatial features. So
insteading of adding more complexity with thread local cleaning,
removing this entirely.

## Testing
Existing unit tests cover the changes made in this PR

## Additional Notes to the Reviewer
<!-- Share any additional context or insights that may help the reviewer
understand the changes better. This could include challenges faced,
limitations, or compromises made during the development process.
Also, mention any areas of the code that you would like the reviewer to
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NO_CHANGELOG=true

Signed-off-by: Sreekanth Vadigi <sreekanth.vadigi@databricks.com>

Author: sreekanth-db

src/main/java/com/databricks/jdbc/api/impl/converters/WKTConverter.java

@@ -23,9 +23,6 @@ public class WKTConverter {
 
   private static final JdbcLogger LOGGER = JdbcLoggerFactory.getLogger(WKTConverter.class);
 
-  private static final ThreadLocal<WKTReader> WKT_READER = ThreadLocal.withInitial(WKTReader::new);
-  private static final ThreadLocal<WKBReader> WKB_READER = ThreadLocal.withInitial(WKBReader::new);
-
   /**
    * Converts WKT (Well-Known Text) to WKB (Well-Known Binary) format.
    *
@@ -44,7 +41,8 @@ public static byte[] toWKB(String wkt) throws DatabricksValidationException {
     try {
       int ogcDimension = ogcDimensionFromWkt(wkt);
       EnumSet<Ordinate> ordinates = determineOrdinates(ogcDimension);
-      Geometry geometry = WKT_READER.get().read(wkt);
+      WKTReader reader = new WKTReader();
+      Geometry geometry = reader.read(wkt);
       JTSOGCWKBWriter writer = new JTSOGCWKBWriter(ordinates, ByteOrder.LITTLE_ENDIAN);
       return writer.write(geometry);
     } catch (ParseException e) {
@@ -65,7 +63,8 @@ public static String toWKT(byte[] wkb) throws DatabricksValidationException {
     try {
       int ogcDimension = ogcDimensionFromWkb(wkb);
       EnumSet<Ordinate> ordinates = determineOrdinates(ogcDimension);
-      Geometry geometry = WKB_READER.get().read(wkb);
+      WKBReader reader = new WKBReader();
+      Geometry geometry = reader.read(wkb);
       int outputDimension = ordinates.size();
       WKTWriter writer = new WKTWriter(outputDimension);
       writer.setOutputOrdinates(ordinates);