feat(develop): [ISSUES #12013] startup.sh support environment CUSTOM_NACOS_MEMORY

[caoyanan666]

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What is the purpose of the change

support #12013

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[CLAassistant]

All committers have signed the CLA.

[KomachiSion]

Please fix your commit user and email and sign CLA

[caoyanan666]

@KomachiSion PTAL

[KomachiSion]

Can you modified the startup.cmd also?

[caoyanan666]

Can you modified the startup.cmd also?

Done