Fix JS github action logic

[jasonpaulos]

For a while, the github action for JS generation has been failing. Example: https://github.com/algorand/js-algorand-sdk/actions/runs/7241641297/job/19725977258

The problem was the logic to invoke the generator in .github/actions/sdk-codegen/entrypoint.sh became outdated and out of sync with scripts/generate_typescript.sh, shown below:

generator/scripts/generate_typescript.sh

Lines 80 to 95 in 88668a4

	# Clean previously (stale) generated files before regenerating them.
	find $SDK_DIR/src/client/v2/algod/models/* $SDK_DIR/src/client/v2/indexer/models/* -delete
	java -jar target/generator-*-jar-with-dependencies.jar \
	template \
	-s "$ALGOD_SPEC" \
	-t "$TEMPLATE_DIR" \
	-m "$SDK_DIR/src/client/v2/algod/models" \
	-p "$TEMPLATE_DIR/algod_config.properties,$TEMPLATE_DIR/parameter_order_overrides.properties" \
	java -jar target/generator-*-jar-with-dependencies.jar \
	template \
	-s "$INDEXER_SPEC" \
	-t "$TEMPLATE_DIR" \
	-m "$SDK_DIR/src/client/v2/indexer/models" \
	-p "$TEMPLATE_DIR/indexer_config.properties" \

Additionally, I've updated the every languages' script to include the new step of cleaning directories before generation, which is currently present in their scripts/generate_x.sh files.

Perhaps there's a smarter way to deduplicate this logic, but I just wanted to fix the problem for now.

[jasonpaulos]

This change succeeded in this job: https://github.com/algorand/js-algorand-sdk/actions/runs/7253725869/job/19761648347