Update rust_example.sh to run the examples in the new format

[alamb]

• part of Reduce the number of distinct binaries to reduce CI / compile time #18142

I think rust_example.sh needs to be fixed to run the examples in this new format.

Originally posted by @Jefffrey in #18289 (review)

Specifcally, as @cj-zhukov has updated the examples we are likely no longer actually execute them as part of CI:

datafusion/ci/scripts/rust_example.sh

Lines 31 to 35 in 32d2618

	example_name=`basename $filename ".rs"`
	# Skip tests that rely on external storage and flight
	if [ ! -d $filename ]; then
	cargo run --profile ci --example $example_name
	fi

Maybe something like add an ExampleKind::All type to the examples and then pass in all as an argument 🤔

[cj-zhukov]

take

[alamb]

done in #18946