software/theia: Version up 1.28.0 and fix IPv6 url

Resolve `@theia/core` subdependency `vscode-uri` to a locally installed patched version, to workaround https://github.com/microsoft/vscode/issues/154048.

This fixes access to Theia through the IPv6 `backend-url`. That issue was discussed in !1204

The patched version of `vscode-uri` is published here: https://github.com/xavth/vscode-uri/tree/fix/ipv6_url_authority

To do this, `yarn.lock` was regenerated, so this also caused a version up to Theia 1.28.0.

See merge request !1227
27 jobs for 1.0
Status Job ID Name Coverage
  External
passed Cloudooo.UnitTest-Master

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

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failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

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failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

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failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

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failed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

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failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

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passed SlapOS.Eggs.UnitTest-Master.Python2

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passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python3

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passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.SlapRunner.ResilienceTest-Master

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

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failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

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failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

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