add 2nd gen GCF OCR sample

[averikitsch]

Fixes #issue

It's a good idea to open an issue first for discussion.

• I have followed Sample Format Guide
• pom.xml parent set to latest shared-configuration
• Appropriate changes to README are included in PR
• API's need to be enabled to test (tell us)
• Environment Variables need to be set (ask us to set them)
• Tests pass: mvn clean verify required
• Lint passes: mvn -P lint checkstyle:check required
• Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• Please merge this PR for me once it is approved.

[snippet-bot]

Here is the summary of changes.

You are about to add 11 region tags.

• functions/v2/ocr/ocr-process-image/src/main/java/functions/OcrProcessImage.java:19, tag functions_ocr_process
• functions/v2/ocr/ocr-process-image/src/main/java/functions/OcrProcessImage.java:56, tag functions_ocr_setup
• functions/v2/ocr/ocr-process-image/src/main/java/functions/OcrProcessImage.java:85, tag functions_ocr_process
• functions/v2/ocr/ocr-process-image/src/main/java/functions/OcrProcessImage.java:105, tag functions_ocr_detect
• functions/v2/ocr/ocr-process-image/src/main/java/functions/OcrProcessImage.java:185, tag functions_ocr_process
• functions/v2/ocr/ocr-process-image/src/main/java/functions/OcrProcessImage.java:186, tag functions_ocr_setup
• functions/v2/ocr/ocr-process-image/src/main/java/functions/OcrTranslateApiMessage.java:19, tag functions_ocr_translate_pojo
• functions/v2/ocr/ocr-save-result/src/main/java/functions/OcrSaveResult.java:19, tag functions_ocr_save
• functions/v2/ocr/ocr-save-result/src/main/java/functions/OcrTranslateApiMessage.java:19, tag functions_ocr_translate_pojo
• functions/v2/ocr/ocr-translate-text/src/main/java/functions/OcrTranslateApiMessage.java:19, tag functions_ocr_translate_pojo
• functions/v2/ocr/ocr-translate-text/src/main/java/functions/OcrTranslateText.java:19, tag functions_ocr_translate

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