Remove ECS host fields

[AlexRuiz7]

Description

This PR reapplies #572 but preserving the host mappings on the indices that need them.

All the events generators have been updated accordingly.

health status index                            uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   wazuh-states-inventory-hardware  dhSH5dzCQoGKtEHBuP-LUw   1   0        100            0    149.8kb        149.8kb
green  open   wazuh-states-vulnerabilities     ZrShK6tST7CjJ4nlYsxsWg   1   0        100            0    118.9kb        118.9kb
green  open   wazuh-states-fim                 zX0mtMQMRUuktIT3xrsehA   1   0        100            0    156.8kb        156.8kb
green  open   wazuh-alerts-5.x-0001            NbfJdWQSR5OrxE22DNlMAg   1   0          0            0       208b           208b
green  open   wazuh-states-inventory-ports     elmGsBxaTqKbOX1eOuifXg   1   0        100            0    150.2kb        150.2kb
green  open   wazuh-states-inventory-hotfixes  rVcpXnWdT2e0Yz95aHbXCQ   1   0        100            0    117.3kb        117.3kb
green  open   wazuh-states-inventory-system    wLSAb8OcT8WF4NBEYEy9PQ   1   0        100            0    129.9kb        129.9kb
green  open   wazuh-states-inventory-networks  sKia-cnzTQG1wxPiwKiPaQ   1   0        100            0    167.8kb        167.8kb
green  open   wazuh-states-inventory-packages  i1mFWcSmQL-S9f2YAzcFug   1   0        100            0    133.8kb        133.8kb
green  open   wazuh-states-inventory-processes ddS-q4CCSZ-8PslqEEa1sw   1   0        100            0    161.9kb        161.9kb

Related Issues

Resolves #570

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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