Improve Arduino Examples

[gojimmypi]

Description

This is part 2 of 3 improving Arduino examples and related GitHub workflows.

New workflow here failing as it needs wolfSSL/wolfssl#9091; See also wolfSSL/Arduino-wolfSSL#20

Enclosed:

Arduino CI Build 2: https://github.com/$REPO_OWNER/wolfssl-examples/.github/workflows/arduino-release.yml
- Tests examples based on latest published release of Arduino library, NOT latest on wolfssl github.
- Should be identical to Arduino CI Build 3 in every way but wolfssl install.
- Copies only compile script from wolfssl-examples
- Builds local examples
- No other repos used

Arduino CI Build 3: https://github.com/$REPO_OWNER/wolfssl-examples/.github/workflows/arduino.yml

• Fetches current wolfSSL from https://github.com/$REPO_OWNER/wolfssl
• Creates an updated Arduino library
• Compiles local examples
• Contains the source of compile-all-examples.sh and respective board-list.txt

The other 2 parts (wolfssl and Arduino-wolfssl repos)

Arduino CI Build 1: https://github.com/$REPO_OWNER/wolfssl/.github/workflows/arduino.yml

• Builds Arduino library from local clone of wolfssl master branch
• Fetches examples from https://github.com/$REPO_OWNER/wolfssl-examples

Arduino CI Build 4: https://github.com/$REPO_OWNER/Arduino-wolfssl/.github/workflows/arduino.yml
- Assembles and installs an updated Arduino wolfssl library from LOCAL wolfssl master source
- Copies only compile script copied from wolfssl-examples
- Builds local examples
- No other repos used

Examples

Adds 2 new DTLS examples as noted in wolfSSL/Arduino-wolfSSL#18

Updates existing examples for improved "out of the box" initial experience without manual config.

Improves board testing: removed script exclusions and added a board_list.txt file with optional example exclusions.

Note upstream wolfSSL needs some fixes:

• Disallow atomics during fence & WOLFSSL_NO_ATOMIC wolfssl#9076
• Force old OID values: WOLFSSL_OLD_OID_SUM for WC_16BIT_CPU wolfssl#9075
• Improve Arduino Examples wolfssl#9091

See also my dev examples:

• Arduino CI Build (1 of 4) wolfssl
• Arduino CI Build (2 of 4) Release Arduino wolfSSL for Local Examples
• Arduino CI Build (3 of 4) Latest wolfSSL for Local Examples
• Arduino CI Build (4 of 4) Arduino-wolfSSL

[gojimmypi]

For the reasons noted in wolfSSL/wolfssl#9091 (comment) -

I've removed the artifact-saving step in the arduino.yml and arduino-release.yml workflows.