Disable building `hdc_standard` native tool in OpenHarmony 3.1

The build for openharmony-standard-image can fail unless libssl-dev package is installed.

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Running

$ bitbake openharmony-standard-image

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Custom settings

build/conf/local.conf: OPENHARMONY_VERSION = "3.1"

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Task which fails

ERROR: openharmony-standard-3.1-r0 do_compile

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Errors:

• fatal error: openssl/evp.h: No such file or directory
• fatal error: openssl/bio.h: No such file or directory

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Logfile: log.do_compile.6350

It shouldn't be needed as we have a separate recipe for the host tool: https://gitlab.eclipse.org/eclipse/oniro-core/meta-openharmony/-/blob/kirkstone/recipes-devtools/hdc/hdc_1.1.1l.bb