fix: Add validation for network acl

[vburckhardt]

Description

Same as #1096 for sg - merge after #1096

• Added validation to the network_acls variable in variables.tf to ensure that each network ACL rule specifies at most one protocol (tcp, udp, or icmp), or omits all to allow all protocols. This prevents users from defining rules with multiple protocols, which could cause configuration errors (API error at apply time).

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Release notes content

• Added validation to the network_acls variable in variables.tf to ensure that each network ACL rule specifies at most one protocol (tcp, udp, or icmp), or omits all to allow all protocols. This prevents users from defining rules with multiple protocols, which could cause configuration errors.

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[vburckhardt]

/run pipeline

[vburckhardt]

/run pipeline

[vburckhardt]

/run pipeline

[ocofaigh]

/run pipeline

[ocofaigh]

Test failed due to a bug thats fixed in #1113
Will rebase once thats merged and retry

[ocofaigh]

/run pipeline

[terraform-ibm-modules-ops]

🎉 This PR is included in version 8.12.1 🎉

The release is available on:

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• v8.12.1

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