[Task]: Do not URL-encode links when sharing a catalog example in Playground

[alexeyinkin]

What needs to happen?

When clicking "Share my code" on an unmodified catalog example, the shareable link is in the following format:

https://play-dev.beam.apache.org/?path=SDK_JAVA%2FPRECOMPILED_OBJECT_TYPE_EXAMPLE%2FMinimalWordCount&sdk=java

It has %2F for slashes. It is inconvenient to extract path from it. Slashes are not required to be encoded for most applications. We should not encode them.

Issue Priority

Priority: 3 (nice-to-have improvement)

Issue Components

• Component: Python SDK
• Component: Java SDK
• Component: Go SDK
• Component: Typescript SDK
• Component: IO connector
• Component: Beam examples
• Component: Beam playground
• Component: Beam katas
• Component: Website
• Component: Spark Runner
• Component: Flink Runner
• Component: Samza Runner
• Component: Twister2 Runner
• Component: Hazelcast Jet Runner
• Component: Google Cloud Dataflow Runner

[alexeyinkin]

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